{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Anomalous Geomagnetic Variation of External Origin Over an Underground Conductor","author_name":"T. Rikitake","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B001E4VG36.html\">Anomalous Geomagnetic Variation of External Origin Over an Underground Conductor</a>","width":400,"height":300}